European rounding rings help repair technicians restore brass instrument tubing that remains out of round after dent removal. Passing or working the correctly sized ring over the supported tubing can help bring its exterior profile back toward a consistent circular shape. Ferree’s rounding rings can be ordered in diameters from 1.750 inches to 7 inches, providing options for different brasswind repair applications. Accurate measurement and careful size selection are essential. Use controlled technique and inspect the tubing frequently to prevent stretching, marking or changing its intended dimensions.